Guided Example #1 - Implicit Differentiation

Find dydx if x4+2y2=8.

A. dydx=x3y     B. dydx=-x3y     C. dydx=-x34y     D. dydx=4x3y

 


Implicitly differentiating by taking the derivative of both sides with respect to x yields the following. 4x3+4ydydx=0